From: An investigation into the cause of road failure along Sagamu-Papalanto highway southwestern Nigeria
Swell potential | Plasticity index (%) | Â | Â | Swell potential | Liquid limit (%) | Â | Â |
---|---|---|---|---|---|---|---|
Holtz and Gibbs (1956) | Chen (1988) | IS:1498 (1970) | Â | Chen (1965) | Snethan et al. (1977) | IS: 1498 (1970) | Â |
Low | < 18 | 0–15 | < 12 | Low | < 30 | < 50 | 35–50 |
Medium | 15–28 | 10–35 | 12–23 | Medium/marginal | 30–40 | 50–60 | 50–70 |
High | 25–41 | 20–55 | 23–32 | High | 40–60 | > 60 | 70–90 |
 |  |  |  | Very high | > 60 | – | 20–35 |